POS Machine Main Cylinder

Bore: Φ180 mm

Rod: Φ110 mm

Stroke: 1,450 mm

Operating pressure: continuous 20 MPa, max 25 MPa

Max push force: 509 kN (at 20 MPa, measured)

Max pull force: 319 kN (at 20 MPa, annular side)

Breakaway pressure: ≤0.3 MPa (low-friction seals)

Piston velocity: 0.02 – 0.3 m/s (slow pressing, fast retract adjustable)

Operating frequency: intermittent heavy duty, 1–2 cycles per press sequence

Internal leakage: ≤0.025 ml/min (at 20 MPa, over seal service life)

Static holding: ≤0.5 mm piston drift over 24 h under full load (with hydraulic lock)

Temperature range: -20 ℃ to +100 ℃ (standard); customizable -40 ℃ to +150 ℃

Fluid: anti-wear hydraulic oil; fire-resistant fluids optional

Suitable for: powder compacting presses, hot presses, composite material presses, ceramic presses, etc.

Heavy-Duty Long-Stroke Design

Both barrel and piston rod are made from high-yield-ratio quenched-and-tempered alloy steel; welds are UT/MT inspected and FEA-optimized. Even at full extension the cylinder maintains exceptional bending stiffness and side-load capacity, accommodating mold eccentricities and uneven powder fill.

Low Friction & Precise Pressing

Filled-PTFE and hydrolysis-resistant polyurethane composite seals provide low breakaway pressure, enabling precise pressure control for uniform compact density when combined with a high-accuracy pressure-control system.

Safe Holding & Anti-Drop

An integrated hydraulic lock or counterbalance valve instantly locks the moving platen in the event of a hose burst or power loss, preventing mold damage and personal injury.

Multi-Stage Dust & Corrosion Protection

A metal scraper ring and multiple heavy-duty wipers at the gland block powder and workshop dust. The cylinder exterior is coated with anti-corrosion paint; the piston rod can be upgraded with laser cladding or ceramic spray for extended service life.

Cushioning for Noise Reduction

Progressive cushions at both ends decelerate the platen at the stroke limits, eliminating rigid impacts and significantly reducing noise, protecting both the mold and the press.

Maintenance-Free & Intelligent Monitoring

Self-lubricating composite bushings in the clevises eliminate greasing. Built-in displacement and pressure sensors can be optionally integrated to provide real-time platen position and pressing force feedback for closed-loop control.

Special bore, rod, and stroke

High-temperature seals (≥150 ℃)

Full stainless steel body and piston rod (corrosive powders)

Built-in displacement / pressure sensors

Explosion-proof / mining certifications